JSFiddle - React, Tailwind, and code Playground

HTML

<input type='button' class='button' value='change color'>
<div>

</div>

CSS

div{
  width: 200px;
  height: 200px;
  background-color: green;
}

.red{
  background-color: red;
}

JavaScript

$(document).ready(function(){
	  $('.button').click(function(e){    
     $('div').toggleClass('red');
    });
});